Fastening device



July 2, 1929. A. NOVICK FASTENING DEVICE Original Filed Aug. 7, 1926 Patented July 2, 1929.

UNITED STATES PATENT OFFICE.

ABRAHAM NOVICK, OF FIlUSHING, NEW YORK, ASSIGNOR TO I. SMITI-IE MACHINE 00., INC 01 NEW YORK, N. Y., A CORPORATION OF NEW YORK. v

FASTENING nnvron.

Application filed August 7, 1926, Serial No. 127,826. Renewed November 27, 1928.

My present invention relates to closures or fastening means for paperv or similar material fabricated out of the ,material itself. l/Vhile useful in a variety of ways, as for general oflice use, my invention is of particular utility for securing together the ends of straps for binding bundles of envelopes and is here illustrated for such use.

The invention will be best understood from the following detailed description taken with the annexed drawing in which I Figure 1 illustrates the invention applied to such a strap as aforementioned and shows the strap secured around a bundle of envelopes;

Figure 2 shows the strap detached as by disengaging the fastening shown in Figure 1, and. folding back the ends Figure 3 is a sectional view of an envelope band taken on line 3-3 of Figure 1;

Figure 4 is an enlarged view of the fastening showing the tabs disengaged from the slit, and the position assumed by them upon the application of pressure tending to pull the ends of the strap apart; and

Figure 5 is a view in section, taken on line 55 of Figure 4.

Referring now to the drawing by characters of reference, 10 denotes the envelope strap of paper or other fabric secured around a bundle of envelopes 11. Preferably, the strap is placed around the envelope bundle and the ends secured together by automatic means not shown. In this operation the strap is brought around the envelope bundle and the ends a and 6 held in overlapping relation, while registering tabs 0 and c are out therefrom by means of a suitable instrument having a cutting edge. Tabs 0 and 0 leave cor-' responding holes or slots (2 and d. A slit 6 through both ends is also out behind the base of tabs 0 and c. The tabs 0 and 0 are now folded back by suitable mechanism and threaded into the slit d as shown in Figure 1.

A feature of the invention resides in the shape of the tabs 0 and 0'. It will be noted that as shown the edges of the tabs 0 and 0 diverge from the base thereof. This means that when the tabs are bent back beneath the ends of the strap and pressure is applied to expand the closed strap, it will be impossible for the undermost or holding tab 0 to-thread out of the slot (barring the possibility of the tab crimping longitudinally) due to the di-' verging edges thereof. This is clearly shown A in Figures 4 and 5. To leave the slot,tl1e tab must be swung into full registry therewith.' This however cannothappen due not only to the friction of the edges ofthe-holding tab, against the edges of-the slot adjacent the base thereof, but also to the fact that in the case of thepreseut invention the end of the holding tab is secured within the slit 6.

The shape of the tabs may of course be other than the sector of a circle shown provided the divergence of the edges thereof from the base be maintained.

What I claim as new is:

1. Fastening means for paper. sheets and the like comprising a tab cut from one sheet to be joined and enteredinto a substantially registering slot of a second sheet and bent beneath said sheets, said tab and slot having edges immediately diverging from their respective bases, said tab being entered into registering slits in said sheets.

2. Fastening means for paper sheets and the like comprising registering tabs out from the overlapping sheets to be joined, said tabs having edges immediately diverging from their bases, and being bent back beneath said sheets and entered within registering slits therein.

3. A strap of paper or other fabric having overlapping ends and fastening means there for comprising a tab cut from one end, entered into a substantially registering slot of said other end and bent beneath. said end, said tab and slot having edges immediately diverging from their respective bases, said tab being entered in registering slits in said ends.

4. A strap of paper or other fabric having overlapping ends and fastening means therefor comprising registering tabs out from said ends, said tabs havingedges immediately divergent from their bases and bent back be-,

neath said sheets and entered within registering slits therein.

5. In combination, a bundle of envelopes and a strap therefor, having overlapping ends and fastening means therefor comprising registering tabs cut from said ends, said tabs having edges immediately divergent from their bases and bent back beneath said sheets and entered within registering slits therein said strap being placed under tension by the resilv iency of the envelope pack.

6. In combination, a bundle of envelopes and a strap therefor having overlapping ends and fastening means therefor, comprising a tab 7 cut from one of said ends and entering into a substantially registering slot in said overlapping ends and bent beneath said strap, said tab and slot having edges diverging from their respective bases, said tab being entered into a registering slit in said strap,and said strap being placed under tension by the resiliency of the envelope pack.

7. In combination, a bundle of envelopes and a straptherefor having overlapping ends and fastening means therefor, comprising a tab cut from one of said ends and entering into a substantially registering slot in said overlapping ends and bent beneath said strap, said tab and slot having edges diverging from their respective bases, said tab being entered into a registering slit in said strap, and

means including the tension of said envelope pack for preventing said tabs from becoming disengaged.

8. In combination, a bundle of envelopes and a strap therefor having overlapping ends and fastening means therefor, comprising a tab cut from one of said ends and entering into a substantially registering slot in said overlapping ends and bent beneath. said strap, said tab and slot having edges diverging from their respective bases, said tab being entered into a registering slit in said strap, and means for preventing said tabs from becoming disengaged.

In testimony whereof I have aflixed my signature to this specification.

ABRAHAM NOVICK. 

